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Add missing mov cs, rm and mov rm, cs opcode.

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Godzil 2021-04-16 00:32:08 +01:00
parent 146e2b2c1d
commit 4082d37cb0
1 changed files with 19 additions and 3 deletions
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22
source/nec/nec_debugger.c
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@ -327,7 +327,7 @@ typedef enum modrmValues
const char *modrmReg8List[8] = { "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" };
const char *modrmReg16List[8] = { "ax", "cx", "dx", "bx", "sp", "bp", "si", "di" };
const char *segmentRegList[4] = { "ds", "cs", "ss", "es" };
const char *segmentRegList[4] = { "es", "cs", "ss", "ds", "ILLEGAL", "ILLEGAL", "ILLEGAL", "ILLEGAL" };
static inline void get_mod_reg_rm(uint8_t value, uint8_t *mod, uint8_t *reg, uint8_t *rm, uint8_t *modrm)
{
if (mod)
@ -1195,11 +1195,27 @@ int nec_decode_instruction(uint16_t segment, uint16_t offset, char *buffer, unsi
break;
case PR_RM16_SEG:
// TODO: Find how to decode the segment value
param1 = cpu_readmem20(MAKE_LINEAR(segment, currentOffset));
currentOffset++;
get_mod_reg_rm(param1, NULL, &reg, NULL, &modrm);
currentOffset += decode_modrm(segment, currentOffset, modrm, false, buffer, bufferSize);
param1 = (cpu_readmem20(MAKE_LINEAR(segment, currentOffset + 1)) << 8) |
cpu_readmem20(MAKE_LINEAR(segment, currentOffset));
currentOffset += 2;
snprintf(buf, 63, ", %s", segmentRegList[reg]);
strncat(buffer, buf, bufferSize);
break;
case PR_SEG_RM16:
// TODO: Find how to decode the segment value
param1 = cpu_readmem20(MAKE_LINEAR(segment, currentOffset));
currentOffset++;
get_mod_reg_rm(param1, NULL, &reg, NULL, &modrm);
snprintf(buf, 63, ", %s", segmentRegList[reg]);
currentOffset += decode_modrm(segment, currentOffset, modrm, false, buffer, bufferSize);
param1 = (cpu_readmem20(MAKE_LINEAR(segment, currentOffset + 1)) << 8) |
cpu_readmem20(MAKE_LINEAR(segment, currentOffset));
currentOffset += 2;
strncat(buffer, buf, bufferSize);
break;
default: